chore: improve feature flag error feedback (#10304)

packages/server/dataloader/customLoaderMakers.ts

@@ -938,7 +938,9 @@ export const featureFlagByOwnerId = (parent: RootDataLoader) => {
 
         const missingFeatureNames = featureNames.filter((name) => !existingFeatureNameSet.has(name))
         if (missingFeatureNames.length > 0) {
-          throw new Error(`Feature flag name(s) not found: ${missingFeatureNames.join(', ')}`)
+          console.error(
+            `Feature flag name(s) not found: ${missingFeatureNames.join(', ')}. Add the feature flag name with the addFeatureFlag mutation.`
+          )
         }
       }
 

packages/server/graphql/private/mutations/applyFeatureFlag.ts

@@ -71,6 +71,14 @@ const applyFeatureFlag: MutationResolvers['applyFeatureFlag'] = async (
         ? teamIds.map((teamId) => ({teamId, featureFlagId}))
         : orgIds.map((orgId) => ({orgId, featureFlagId}))
 
+  if (values.length === 0) {
+    return standardError(
+      new Error(
+        'No valid subjects found to apply the feature flag. Check the scope of the feature flag.'
+      )
+    )
+  }
+
   await pg
     .insertInto('FeatureFlagOwner')
     .values(values)

packages/server/graphql/public/typeDefs/FeatureFlag.graphql

@@ -13,4 +13,9 @@ type FeatureFlag {
   Expiration date of the feature flag
   """
   expiresAt: DateTime!
+
+  """
+  The scope of the feature flag
+  """
+  scope: FeatureFlagScope!
 }